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" (No Model.)

7G. w; LAKE. DOOR WINDOW CLAMP. No. 514,085. Patented Feb. 6, 1894.

UNITED STATES PATENT OFFICE:

GEORGE W. LAKE, OF MONTIGELLO, IOWA, ASSIGNOB OF ONE-HALF TO CHARLES H.RASTEDE, OF SAME PLACE.

DOOR OR WINDOW CLAMP.

SPECIFICATION forming part of Letters Patent NO. 514,085, dated February6, 1894.

I Application filed April 14, 1893. $erial No. 470,361. (No model.)

door, window-sash, plank or board so as to permit the carpenter or otherartisan to plane off or operate upon the upper edge of the article thussupported.

The objects of my invention are to provide a simple, effective andinexpensive contrivance which is capable of engaging a vertical edge ofthe article to be supported in order 1 that the lower edge of sucharticle may rest upon the floor, bench or other support; and,

furthermore, to provide a device of the class named which will engagewithout marrin g the article supported.

Further objects and advantages of my invention will appear in thefollowing description, and the novel features thereof will beparticularly pointed out in the claims.

In the drawings-Figurel is a perspective view of the clamp embodying myinvention, applied in the operative position to a door. Fig. 2 is a planview of the clamp, showing the jaws extended or expanded in full lines,and in their clamped positions in dotted lines. Fig. 3 is a plan view insection.

Similar numerals of reference indicate corresponding parts in all thefigures of the draw- 111 s.

I and 2 represent, respectively, parallel spaced side springs or plates,between the rear ends of which is arranged a space-block 3-to which therear ends of the side springs or plates are firmly secured. Extendingtransversely through the space-block and registering perforations in theside springs or plates is a rivet pin 4, whose ends extend throughwasher plates 5arranged upon the outer surfaces of the side springs orplates and are headed, and in addition to this securing device, screws 6are employed at the rear extremities of the springs or plates.

The front ends of the side springs or plates are beveled, as shownclearly in Fig. 2 of the drawings, and to the outer surface of saidbeveled ends are secured hinges 7 which form the connection between thefront ends of the side springs or plates and intermediate points ofthetriangularjaws 8. These jaws are provided with bases 9 which are inalignment with each other and are respectively perpendicular to theinner edges of the jaws, such inner edges being connected pivotallytogether by means of hinges 10 which are so disposed as to form, whenthe jaws are in transverse alignment, an interval into which the edge ofthe door, or window-sash, or other article is adapted to fit. Secured toand flush at their inner edges with the vertical edges of the jaws arecleats 11 thereby increasing the surface of the clamping portions of theaws.

The strengthening bar or check 12 is arranged between the side springsor plates adjacent to their front ends and secured at one end rigidly toone of said springs or plates,

- the other end being free from the twin spring or plate. The advantagederived from this construction is that the springs or plates are enabledto separate at their front ends to permit of the adjustment of the jawsto fit the article to be clamped. The side springs or plates areconcaved or hollowed at their outer faces near their rear ends in orderto enhance the spring action of such parts.

From the above description it will be understood that the tendencyof theside springs or plates is toward each other, thereby holding the jawseither in the open position, shown in full lines in Fig. 2, in whichposition the free ends of the springs or plates are in contact with theends of the check bar, or in the position shown in dotted lines of saidFig. 2 in which the inner edges of the jaws are in contact, and the freeends of the springs or plates, as in the other position, are in contactwith the ends of the checlc Thus, the parts being in the position shownin full lines in Fig. 2 and resting upon the floor or bench, it isnecessary, to operate the clamp, merely to insert the vertical. edge ofa door, or windowsash between the edges and press said vertical edgeagainst the hinge connections by which said jaws are united, to causesaid jaws to approach each other and by the force of the springs orplates clamp the edge of the door or window-sash and hold thelat-ter inthe desired position.

The arrangement by which the lower edge of the door or window-sash isallowed, while supported, to rest upon the floor or bench, enables thecarpenter or other artisan to maintain the article in a horizontalposition and in more convenient position for treatment.

It will be understood that the bases of the jaws are in the plane of thelower edges of the side springs or plates, and the spaceblock, check,and cleats all terminate at their lower ends flush with said lower edgesof the jaws and springs or plates.

Changesin the form, proportion, and minor details of construction may beresorted to without departing from the spirit or sacrificing any of theadvantages of my invention.

Having described my invention, what I claim is- 1. In a clamping device,the combination with spaced parallel springs or plates and permanentconnections between their rear ends, of jaws hinged together and to thefront ends of said springs or plates and adapted to be held in theirclosed and open positions by said springs or plates, substantially asspecified.

2. In a clamping device, the combination with spaced parallel springs orplates and permanent means for connecting their rear ends,

of jaws hinged together and to the front ends of said springs or platesand having their bases or lower edges in the plane of thelower edges ofsaid springs or plates, substantially as specified.

3. In a clamping device, the combination of side springs or plates,permanent connections between their rear ends, and a check bar betweentheir free front ends, of jaws hinged together and to the front ends ofsaid springs or plates, the inner or adjacent edges of said jaws beingseparated, substantially as specified.

4. In a clamping device, the combination of twin parallel side springsor plates, a permanent connection between their rear ends and capable oflateral vibration at their front ends, jaws having bases perpendicularto their clamping edges, and connections between said jaws and the frontends of said side springs or plates whereby the jaws are held normallyin their clamping positions by the springs or plates, substantially asspecified.

In testimony that I claim the foregoing as my own I have hereto affixedmy signaturein the presence of two witnesses.

GEORGE W. LAKE.

Witnesses:

W. H. HUGHES, CHARLES H. RASTEDE.

